Sunday, 30 October 2011

The dead hair cells are filled with a tough, waterproof protein called keratin, as a nails, and the skin flakes that you lose daily in their millions from your skin's surface. All these things are part of the fantastic protective overcoat that covers and protects your body.

Wednesday, 26 October 2011

Asia - it covers one-third of the total land area of the Earth. North to south it extends from the Arctic Cricle to just south of the Equator and at its widest point it measures 8,500 km (5300 miles). Four billion people - three out of every five of the world's population - live in Asia.

Tuesday, 25 October 2011

1> Jump out of a plane(make sure you have a parachute strapped to your back first!) You will at first accelerate then, as drag(resistance) balances the pull of gravity, you will reach a steady speed called terminal velocity.

Wednesday, 19 October 2011

It may sound ridiculous, but it's true. In 2007, two British environmetalists drove a car 700 km (4500 miles) from Britain to Timbuktu in Mali, Africa, powered by 4000 kg(8800 lbs) of chocolate converted into biofuel.

1. For a dead animal to become a fossil, it needs to be buried quickly before it is eaten or decomposes, by falling into a muddy river bed, or by a sandstorm, for example.2. Soft tissue rots away, but the skeleton remains to be replaced by minerals and turned to rock over millions of years. 3. Over time, mud and river sediments build up over the fossil, forming layer upon layer of sedimentary rocks.4. One more millions of years, erosion and movements in the Earth's crust can expose the fossil, and, with luck, a palaeontologist may find it.

Give or take a few - 6,912. Some languages are used by only a few people. Others, such as Mandari Chinese and English, are spoken by millins. Many people speak two or more languages. They may use one language at home with family and friends, and another at work or school. Regional variations of a language are know as dialects.

The Ancient Greek scientist was trying to find a way of determining whether a crown was made of pure gold. While pondering the problem Archimedes climbed into his bath and saw the water level rise. He realized that he could compare the volume of gold in the crown with a lump of pure gold of the same weight by submerging them and comparig the rise in water level. He leapt out of his bath and cried "Eueka!" ("I have found it!")

Australia covers 7,692,300 sq km (,969,228 sq miles), making it the 6th largest country in the world and just slightly smaller than the United States. Depending on how you look at it, Australia is the smallest continent or the largest islad in the world - and the least populated. It is located in the geographical region of Oceania, along with more than 25,000 islands. The islands are scattered across the enormous expanse of the South Pacific.

A volcano erupts when hot molten rock from deep inside the Earth bursts out of the ground. Rivers of liquid rock, called lava, flow down the side of the volcano burning trees, houses, and anything else in their paths. An exploding volcano may also fling out ash, mud, and poisonous gases. Volcanoes are not just destructive, however, and often create new mountains and islands.

Monday, 17 October 2011

Your body's trillions of tiny cells work day and night to keep you alive. To keep going they need energy, which comes from the food you eat. Food also provides the building materials that you cells use to make you grow, but first your body must digest the food, releasing the simple nutrients that your body can use.

Sunday, 16 October 2011

Where the plates of Earth’s crust crash into each other,
land is pushed upwards, forming mountains. The Himalayas are the tallest
mountains on Earth and the youngest. They formed over the last 145 million years,
as India crashed into Asia.

Mountains are also formed when volcanoes erupt and molten
rock builds up into steep mounds.

The Universe is everything we can see, and a lot that we can’t see. It was created in the Big Bang explosion and has been changing and expanding ever since.

The Universe is about 13.7 billion years old. At its beginning it looked nothing like it does today. Yet, everything in today’s Universe did exist in some form back then. It all started with the Big Bang, a kind of explosion that would not only go on to produce all the matter in the Universe but also marked the start of time.